body {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .auth-container {
            width: 100%;
            max-width: 450px;
        }
        
        .auth-card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            padding: 40px;
        }
        
        .auth-logo {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .logo-img {
            width: 80px;
            height: 80px;
            object-fit: contain;
            margin-bottom: 15px;
        }
        
        .system-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        
        .auth-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        
        .auth-subtitle {
            color: var(--text-secondary);
            margin-bottom: 25px;
        }
        
        .form-label {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        
        .form-control {
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 12px 16px;
            font-size: 15px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
        }
        
        .password-input-wrapper {
            position: relative;
        }
        
        .password-input-wrapper input {
            padding-right: 45px;
        }
        
        .toggle-password {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 5px;
            transition: color 0.2s;
        }
        
        .toggle-password:hover {
            color: var(--primary-color);
        }
        
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 20px 0;
        }
        
        .checkbox-label {
            display: flex;
            align-items: center;
            cursor: pointer;
            font-size: 14px;
            color: var(--text-secondary);
        }
        
        .checkbox-label input {
            margin-right: 8px;
        }
        
        .forgot-password-link {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
        }
        
        .forgot-password-link:hover {
            text-decoration: underline;
        }
        
        .btn-primary {
            background: var(--primary-color);
            border: none;
            border-radius: 8px;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            width: 100%;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
        }
        
        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        
        .spinner-border {
            width: 18px;
            height: 18px;
            border-width: 2px;
        }
        
        .auth-divider {
            text-align: center;
            margin: 25px 0;
            position: relative;
        }
        
        .auth-divider::before,
        .auth-divider::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 45%;
            height: 1px;
            background: var(--border-color);
        }
        
        .auth-divider::before {
            left: 0;
        }
        
        .auth-divider::after {
            right: 0;
        }
        
        .auth-divider span {
            background: white;
            padding: 0 15px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        
        .auth-footer {
            text-align: center;
            margin-top: 20px;
        }
        
        .auth-footer p {
            color: var(--text-secondary);
            margin: 10px 0;
        }
        
        .register-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
        }
        
        .register-link:hover {
            text-decoration: underline;
        }
        
        .auth-page-footer {
            text-align: center;
            margin-top: 30px;
            color: white;
            font-size: 14px;
        }
        
        .error-message {
            color: var(--danger-color);
            font-size: 13px;
            margin-top: 5px;
            display: block;
        }
        
        .alert {
            border-radius: 8px;
            padding: 12px 16px;
            margin-bottom: 20px;
            border: none;
        }
        
        @media (max-width: 576px) {
            .auth-card {
                padding: 30px 20px;
            }
            
            .system-name {
                font-size: 20px;
            }
            
            .auth-title {
                font-size: 24px;
            }
        }